﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Example51
{
       class CRectangle
    {
        int width;
        int height;
        public CRectangle(int a, int b)
        {
            width = a;
            height = b;
        }
        public int area()
        {
            return (width * height);
        }
    }
       class Program
       {
           static void Main(String[] args)
           {
               CRectangle recta = new CRectangle(3, 4);
               CRectangle rectb = new CRectangle(5, 6);
               recta = rectb;
               Console.WriteLine("rect a:{0}", recta.area());
               Console.WriteLine("rect b:{0}", rectb.area());
               Console.ReadLine();
           }
       }
}
